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Date: Wed, 3 May 2017 13:07:15 +0200
From: Vulnerability Lab <research@...nerability-lab.com>
To: fulldisclosure@...lists.org
Subject: [FD] Joomla com_tag v1.7.6 - (tag) SQL Injection Vulnerability

Document Title:
===============
Joomla com_tag v1.7.6 - (tag) SQL Injection Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2061

IEDB: http://iedb.ir/exploits-7454.html


Release Date:
=============
2017-05-02


Vulnerability Laboratory ID (VL-ID):
====================================
2061


Common Vulnerability Scoring System:
====================================
6.6


Vulnerability Class:
====================
SQL Injection


Product & Service Introduction:
===============================
Tag Meta allows to efficiently manage all site`s meta information. With Tag Meta, as example, it is possible to set the 
tag `title` or the meta tags (e.g. from the most common `description`, `keywords`, `robots`, as well as the recently 
`content rights` and `external reference`) or link `canonical` on any page, just specifying the URL or a part of it. 
This provides a swiss army knife to improve site positioning in SEO optimization. But Tag Meta also supports regular 
expressions in the matching rules and this allows to match a group of URLs with a single rule. In this way it is 
possible to manage metadata from a single control panel.

(Copy of the Homepage: https://extensions.joomla.org/extension/tag-meta/ )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory partner team discovered a sql-injection vulnerability in the official Joomla CMS com_tag (meta) component.


Vulnerability Disclosure Timeline:
==================================
2017-05-02: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================
SelfGet
Product: Joomla com_tag (Meta) Components - (Community) 1.7.6


Exploitation Technique:
=======================
Remote


Severity Level:
===============
High


Technical Details & Description:
================================
A remote sql-injection web vulnerability has been discovered in the official Joomla CMS com_tag (meta) component.
The issue allows remote attackers to execute own malicious sql commands to compromise the web-application or dbms.

The sql-injection vulnerability is located in the `tag` parameter of the `com_tag` joomla web module. The request method 
to execute is GET and the attack vector is client-side. Remote attackers are able to inject own malicious sql commands 
via vulnerable `tag` parameter to compromise the web-application or dbms. The web vulnerability is a classic sql-injection 
in the joomla content management system `com_tag (meta)` component.

The security risk of the vulnerability is estimated as high with a common vulnerability scoring system count of 6.6. 
Exploitation of the sql-injection vulnerability requires no privilege web-application user account or user interaction. 
Successful exploitation of the web vulnerability results in web-application or database management system compromise.

Request Method(s):
[+] GET

Vulnerable Components(s):
[+] com_tag (joomla)

Vulnerable File(s):
[+] index.php

Vulnerable Parameter(s):
[+] tag (&tag)


Proof of Concept (PoC):
=======================
The sql-injection web vulnerability can be exploited by remote attackers without privilege web-application user account 
or user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and 
steps below to continue.


Dork(s):
inurl:index.php?option=com_tag


PoC: Exploitation
http://localhost:8080/[PATH]/index.php?option=com_tag&task=tag&tag=-`[SQL-Injection Vulnerability!]--


Security Risk:
==============
The security risk of the sql-injection web vulnerability in the joomla component is estimated as high (CVSS 6.6).


Credits & Authors:
==================
Amir - Iranian Exploit Database (www.iedb.ir) [http://www.vulnerability-lab.com/show.php?user=IEDB%20Team]

Thanks: C0dex,B3hz4d,Beni_vanda,Mr_time,Bl4ck M4n,black_security,Yasser,Ramin Assadian,Black_Nofuzi,SecureHost,
1TED,Mr_Kelever,Mr_keeper,Mahmod,Iedb,Khashayar,B3hz4d4,Shabgard,Cl09er, Be_lucky,Moslem Haghighian,Dr_Iman,8Bit,
Javid,Esmiley_Amir,Mahdi_feizezade,Amin_Zohrabi,Shellshock3 and all my friends + all members of the Iedb.Ir Team.


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=========================
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